CN101183528B - Method of inserting vector information, method of transmitting vector information, and method of estimating voice data - Google Patents
Method of inserting vector information, method of transmitting vector information, and method of estimating voice data Download PDFInfo
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- CN101183528B CN101183528B CN2007101039371A CN200710103937A CN101183528B CN 101183528 B CN101183528 B CN 101183528B CN 2007101039371 A CN2007101039371 A CN 2007101039371A CN 200710103937 A CN200710103937 A CN 200710103937A CN 101183528 B CN101183528 B CN 101183528B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
Abstract
Disclosed are a method of inserting vector information for estimating voice data in a key re-synchronization period, a method of transmitting vector information, and a method of estimating voice data in a key re-synchronization period using vector information, capable of estimating the voice data that corresponds to a silent period occurring in a key re-synchronization process when an encrypted digital voice is transmitted in a unidirectional wireless communication environment. A transmitter side inserts accumulation information (i.e., vector information) of a voice change direction of the transmitted previous frame in a key re-synchronization frame, using a voice feature that draws a sine wave, when making the key re-synchronization frame for the re-synchronization, and transmits the key re-synchronization frame with the vector information inserted thereto. A receiver side estimates the voice data value in the key re-synchronization period using the accumulation information (i.e., vector information) in the voice change direction and slopes of the received voice data, to minimize the difference between the original voice and the estimated voice.
Description
Technical field
The present invention relates to a kind of insertion be used for estimating tone again lock in time section method, a kind of method that sends vector information and a kind of vector information of using of vector information of speech data estimate the tone method of the speech data in section lock in time again, when digital speech that transmission in the uni-directional wireless communication environment is encrypted, described method can be estimated and the corresponding speech data of silence period section that occurs in the synchronizing process again at tone (key).More specifically, the present invention relates to a kind ofly insert the method for vector information again in the synchronization frame to tone, a kind of method that sends vector information, and a kind of method of using the speech data in the silence period section that vector information estimates that tone occurs in the synchronizing process again, described vector information is constructed by extract voice change direction information from phonetic feature, and this phonetic feature has constituted nonmutationed sine wave.
Background technology
In the communication means of routine, be handle like this tone again lock in time section: tone data is taken as language data process or reuses speech data the preceding in the synchronous processing again at tone.But, this method caused raw tone and output between the voice than big-difference, spectators thereby can clearly find the tone voice quality loss in section lock in time again.
Especially, owing in the uni-directional wireless environment, only transmit data, whether normally received so can't confirm data in a direction.Therefore, when enciphered data was transmitted in above-mentioned environment, if receiving end can not be received initial tone information, then the total data in corresponding session all can't be decoded.
In order to solve slow participation (late participation) problem, the tone that is used for transmission tone information periodically for the coded communication in the uni-directional wireless environment is method for synchronous again.If be to use tone method for synchronous again under the state of digitize voice in the data that send and receive by coded communication, then the silence period section will lock in time, section occurs along with again.Because this silence period section periodically occurs, so it has reduced the communication quality of receiving end.
The present invention relates to a kind ofly in the uni-directional wireless coded communication, estimate again the technology of speech data value in the silence period section of section lock in time, and relate to the technology of proofreading and correct the loss frame.
Can use method such as HAM, splicing (splicing), the replacement of mourning in silence, noise replace and method such as repeat is lost as the frame of handling in the voice data transmission that uni-directional wireless communicate by letter.
These technology are speech frame is lost in estimation in uni-directional wireless communication values.Splicing is that its shortcoming is owing to loss causes appearance very close to each other with the method for the frame stack of two vicinities, and the timing of stream is interrupted.The replacement of mourning in silence is to add the method for mourning in silence to the time period of losing.But along with the increase of lost packets size, its performance can reduce.
It is a kind of method of using ambient signals to recover uncared-for voice signal that noise replaces, and wherein noise is added in the uncared-for part of voice signal.The ability that this method end user class phoneme (phoneme) recovers, everyone this kind of capacity variance is very big.Repeating is a kind of method of inserting the voice signal that the most approaching moment receives repeatedly in loss of voice in the time period.This method has following shortcoming: if frame is extended, then sound also is extended.
In addition, also have the status information of a kind of use compress speech codec (codec) to recover the technology of mourning in silence of loss of voice in the time period.Because this method user mode information, and this status information might be different for each codec, so this method codec that places one's entire reliance upon, and has greatly increased calculated amount.
Summary of the invention
Therefore, the present invention relates to a kind of insertion be used for estimating tone again lock in time section method, a kind of method that sends vector information and a kind of vector information of using of vector information of speech data estimate the tone method of the speech data in section lock in time again, described method has avoided fully because the restriction of correlation technique and one or more problems that defective is caused.
An object of the present invention is to provide and a kind ofly use sinusoidal wave phonetic feature structure vector information and insert the method for this vector information again in section lock in time at tone, and a kind of method that sends this vector information, so that estimate the tone speech data in section lock in time again under the uni-directional wireless communication environment.
Another object of the present invention provides a kind of vector information of using and estimates and the tone of the periodically appearance method of the corresponding speech data value of the silence period section in section lock in time again that described vector information is a voice change direction information in the uni-directional wireless communication environment.
Other advantage of the present invention, purpose and feature will partly be illustrated in follow-up explanation, and verify follow-up description or put into practice those technician with this area general knowledge and partly become apparent when of the present invention.Can realize and reach purpose of the present invention and other advantage by specifically described structure in disclosed instructions, claim and the accompanying drawing herein.
To achieve these goals, provide a kind of according to the specific embodiment of the invention, in the transmitter terminal of the enciphered digital voice communication of using the uni-directional wireless environment, insert be used for estimating tone again lock in time section the method for vector information of speech data, this method may further comprise the steps: if arrive lock in time with respect to the frame tone that will send, then delete the tone speech data in section lock in time more again; Obtain the speech data of present frame and the difference between the speech data of preceding frame and term change of tune direction (+,-) information structuring vector information, described voice change direction (+,-) information is the result of the difference that obtained; And insert vector information and tone again section lock in time in synchronizing information at the tone from its deletion speech data.
According to another aspect of the present invention, provide a kind of transmitter terminal to send to be used in the enciphered digital voice communication of using the uni-directional wireless environment estimate tone again lock in time section the method for vector information of speech data, this method may further comprise the steps: carry out phonetic synthesis (vocoding) by the voice to input and come encoded speech data; Whether judgement arrives with respect to coded speech data tone lock in time again; According to the result who judges, produce tone synchronization frame and produce speech frame again from speech data by in speech data, inserting the vector information that constitutes by voice change direction information; And send the tone produced synchronization frame and speech frame again, wherein, if being tone, the result who judges arrives lock in time again, then by from tone again section lock in time the described speech data of deletion and described tone insert in section lock in time again the described vector information that constitutes by voice change direction information and described tone again synchronizing information produce tone synchronization frame again, if the result who judges is tone no show lock in time again, then produce the described speech frame that comprises described speech data.
According to a further aspect of the invention, provide a kind of receiver end in the enciphered digital voice communication of using the uni-directional wireless environment to use vector information to estimate the tone method of the speech data in section lock in time again, this method may further comprise the steps: the type of analyzing received frame by the head of analyzing described frame; If received frame is a tone synchronization frame again, then extract tone synchronizing information and vector information again the synchronization frame again from the tone that is sent; Use the tone extracted again synchronizing information carry out tone more synchronously, obtain and the rate of change of the speech data of more described vector information and received frame; If the voice change direction information that is obtained by the vector information analysis is positioned at identical direction with described rate of change, then on oblique line, extract the speech data value, otherwise with the oblique line of described oblique line symmetry on extract the speech data value; And the speech data value of use extracting estimates the tone speech data in section lock in time again, and to the speech data decoding so that export corresponding voice.
Be to be understood that: generality of the present invention is described in the front and follow-up detailed description all is exemplary and illustrative, and the invention that is intended to institute's prescription provides further explanation.
Description of drawings
Accompanying accompanying drawing shows the specific embodiment of the present invention, and is used from instructions one and explains that principle of the present invention, described accompanying drawing are contained in this to provide further understanding of the present invention and to be introduced into and to constitute the application's a part.In the accompanying drawings:
Fig. 1 be illustrate according to a present invention embodiment, be used for using vector information estimate tone again lock in time section the integrally-built synoptic diagram of device of speech data;
Fig. 2 be schematically illustrated according to the present invention embodiment, insert vector information so that can estimate the tone process flow diagram of the process of the speech data in section lock in time again at transmitter terminal;
Fig. 3 be schematically illustrated according to the present invention embodiment, receiver end by extracted vector information estimate tone again lock in time section the process flow diagram of process of speech data;
Fig. 4 A and Fig. 4 B be schematically illustrated according to the present invention embodiment, be used for estimating tone again lock in time section the device of speech data in use vector information estimate tone again lock in time section the silence period section in the process of speech data value, wherein Fig. 4 A illustrates the transmitter terminal structure and inserts vector information; And Fig. 4 B illustrates receiver end extracted vector information, and estimate tone again lock in time section the silence period section in the speech data value.
Embodiment
Referring now to accompanying drawing describe in detail insertion according to preferred implementation of the present invention be used for estimating tone again lock in time section speech data vector information method, send the method for vector information and use vector information to estimate the tone method of the speech data in section lock in time again.
Fig. 1 be illustrate according to the embodiment of the invention be used for use vector information estimate tone again lock in time section the synoptic diagram of unitary construction of device of speech data.
With reference to Fig. 1, according to the embodiment of the invention, be used for estimating tone again lock in time section the device of speech data mainly form by transmitter terminal 10 and receiver end 100.
Described transmitter terminal 10 comprises the input block 11 that is used to receive from the phonetic entry of microphone, be used for by the input voice are carried out phonetic synthesis come to the input voice coding phonetic synthesis machine 12, be used for that lock in time, section was constructed tone synchronization frame and the frame tectonic element 13 of speech frame and the frame transmitting element 14 that is used to send the frame of being constructed again again by judging tone with respect to the speech data of having encoded.
Frame tectonic element 13 obtains the current speech data and is right after the difference between the speech data the preceding, and accumulation and storaged voice change direction (+,-) information continuously, and described voice change direction (+,-) information is to obtain the result of described difference.
In addition, when generation is used to send the tone tone of synchronizing information again during synchronization frame again, frame tectonic element 13 deletion is at the tone speech data in section lock in time again, the voice change direction of use accumulation (+,-) the information structuring vector information, and subsequently with this vector information and tone again synchronizing information together insert tone again in section lock in time.Subsequently, described frame tectonic element 13 sends the tone that produced synchronization frame again to receiver end 100.And when sending described speech frame, described frame tectonic element inserts described vector information in the speech frame.
In other words, the voice change direction of described frame tectonic element 13 accumulations and voice data (+,-) information, and when sending voice, it judges whether tone arrives lock in time again with respect to the speech data that will send.If tone arrives lock in time again, then described frame tectonic element 13 uses the voice change direction of being stored (+,-) information structuring vector information, and produces tone synchronization frame again in section lock in time again by vector information being inserted tone.
But if tone does not arrive lock in time again, then described frame tectonic element 13 is constructed speech frame for the speech data that will send, and vector information is inserted in the speech frame.
Herein, described vector information can only be constructed to distinguish between (+) and (-) direction.For example, (+) and (-) can be mapped as " 1 " and " 0 " respectively.Correspondingly, can use the various methods of between (+) and (-), distinguishing to construct vector information.
On the other hand, receiver end 100 comprises: receiving element is used to receive the frame that sends from transmitter terminal 10; Frame analytic unit 102, be used for by judge exist/do not have received frame tone again synchronizing information come the analysis frame type, if and received frame is tone synchronization frame again, then estimate with tone again lock in time section the corresponding speech data value of silence period section; Demoder 103 is used for the decoded speech data to produce voice signal; And output unit 104, be used to export voice signal.
Exist/there is not tone synchronizing information again in described frame analytic unit 102 by analyzing the head of received frame, judging.If there is tone synchronizing information again in described head, there is tone synchronization frame again in then described frame analytic unit judgement, and extracts described vector information from this frame.
Subsequently, the gradient that preceding frame obtain speech data of described frame analytic unit 102 from receiving recently, and use the gradient of the speech data that is obtained and the vector information of the speech data that extracted is calculated the tone speech data value in section lock in time again.
In other words, if the vector information of the speech data that is extracted is corresponding to (+), then described frame analytic unit obtains the tone speech data value in section lock in time again from the gradient of the speech data that obtained, if and vector information is corresponding to (-), then it obtains the gradient with the gradient symmetry of the speech data that obtained, and obtains the tone speech data value in section lock in time again on oblique line.
Fig. 2 schematically illustratedly inserts vector information according to the embodiment of the invention, in transmitter terminal 10 so that can estimate the tone process flow diagram of the process of the speech data in section lock in time again.
To be encoded to speech data (step 210) via the sound 200 of described input block 11 (as microphone) input by a sound building-up process.
Judgement is with respect to the speech data frame that will send, and whether tone arrives (step 220) again lock in time, and if tone arrive (" Y " of step 220) again lock in time, then delete the corresponding speech data (step 230) of present frame.Subsequently, obtain voice change direction (+,-) information (step 231) according to the difference between the speech data of the speech data of preceding frame and present frame.
Because the waveform characteristic of sinusoidal wave voice, if the speech data value is in the increase direction, then voice change direction (+,-) information increases continuously, and if the speech data value is in and reduces direction, then voice change direction (+,-) information reduces continuously.If current speech data and the difference between preceding speech data that is right after are (+), then speech data is in the increase direction, and if difference is (-), then speech data is in and reduces direction.
The voice change direction that is extracted by speech data (+,-) information constructs vector information (step 232), by with described vector information and tone again synchronizing information insert in the time period of having deleted speech data and construct tone synchronization frame (step 233) again, and send the tone of being constructed synchronization frame (step 234) again.
If tone does not arrive (" N " of step 220) again lock in time, then use speech data to construct described speech frame (step 240), and construct vector information (step 241) at the speech data of preceding frame and present frame by analyzing.Stores voice frames and vector information (step 242) in the internal storage (not shown) of transmitter terminal, and send the speech frame (step 243) of being constructed subsequently.
Fig. 3 is schematically illustrated according to the embodiment of the invention, estimate the tone process flow diagram of the process of the speech data in section lock in time again by extracted vector information in receiver end 100.
If the result who analyzes is that received frame is a tone synchronization frame (step 320 " Y ") again, then receiver end extracts tone synchronizing information and by the vector information (step 330) of voice change direction (+,-) information formation again from received frame.
Described receiver end use the tone that extracted again synchronizing information carry out tone (step 331) synchronously again, and the voice change direction of judging the gradient and vector information by the grade information that relatively obtains from the speech data of institute's received frame and vector information whether identical (step 332).
If the gradient that the speech data of frame (not shown), received obtains from the internal storage that is stored in described receiver end is identical direction (" Y " in the step 332) with the voice change direction of vector information, then on the oblique line that the speech data by frame in the internal storage that is stored in described receiver end, received obtains, extract the speech data value (step 333) in the silence period section.
If the result who judges is their direction difference (" N " in the step 332), then obtain and the symmetrical gradient of the gradient that obtains from the speech data of received frame, and on the oblique line of symmetry, extract speech data value (step 334) in the silence period section.The speech data value of being extracted be estimated as tone again lock in time section the silence period section in speech data, and by decode procedure (step 335) as voice output (step 336).
On the other hand, if the result who judges is that received frame is not a tone synchronization frame (" N " in the step 320) again, then the received speech data by decode procedure is provided as voice signal (step 340).Subsequently, use at preceding frame and present frame calculates and the gradient (step 341) of storage current speech data, and present frame is stored in the internal storage of receiver end (step 342) so that use this present frame afterwards.Subsequently, received voice signal is used as actual voice output (step 343).
Therefore, receiver end 100 can use the voice change direction information of the vector information that extracts of rate of change (gradient of the speech data value of the speech frame that promptly receives) and speech data come the tone of estimate sheet to wireless communications environment under more synchronously in speech data value in the silence period section of appearance near raw tone.
Fig. 4 A and Fig. 4 B be schematically illustrated according to the embodiment of the invention, be used for estimating tone again lock in time section the device of speech data in use vector information estimate tone again lock in time section the silence period section in the synoptic diagram of process of speech data value.More specifically, Fig. 4 A shows transmitter terminal structure and inserts vector information, and Fig. 4 B shows receiver end extracted vector information and estimate tone again lock in time section the silence period section in the speech data value.
With reference to Fig. 4 A and 4B, suppose that the 5th and the 8th time period is corresponding to tone lock in time again.If the sinusoidal wave speech medium pitch in transmitter terminal 10 arrives lock in time again, then delete corresponding to the tone speech data in the 5th and the 8th time period of lock in time again, and with tone again synchronizing information replace above-mentioned speech data.
In other words, the speech data of the 5th time period is replaced by voice change direction (+) information, and wherein said voice change direction (+) information is to use in the synchronizing information X acquisition again of the speech data of the 4th time period and the difference between the speech data of the 5th time period and tone.The speech data of the 8th time period is replaced by voice change direction (+) information, and wherein said voice change direction (+) information is to use in the synchronizing information Y acquisition again of the speech data of the 7th time period and the difference between the speech data of the 8th time period and tone.The data that as above rebuild are sent to receiver end 100.
If tone synchrodata arrival again corresponding to the 5th time period, then because the value of slope (+) that uses the speech data of the 3rd and the 4th time period to obtain equals voice direction (+) information in the frame that receives, thus receiver end 100 with tone again synchrodata be estimated as the speech data value that is positioned on the straight line A.
If tone synchrodata arrival again corresponding to the 8th time period, then because the value of slope (+) that uses the speech data of the 6th and the 7th time period to obtain is different from voice direction (+) information in the frame that receives, so receiver end 100 with tone again synchrodata be estimated as the speech data value that is positioned on the straight line C, its cathetus C and straight line B symmetry.
Especially, under the situation of the 8th time period, because different from voice direction (+) information of the 6th value of slope (+) that calculates with the speech data of the 7th time period and the 8th time period, thus calculate and the straight line C of straight line B symmetry, and estimate the speech data value that is positioned on the straight line C subsequently.
As mentioned above, according to the present invention, the feature that demonstrates the speech data value of smooth variation by use in the unidirectional wireless environment estimates approx because the speech data value in the silence period section that periodic tone occurs more synchronously, and so can improve the communication quality of receiver end.In addition, because the method according to this invention needs additional information to proofread and correct voice and compare this method with classic method only to need relative more a spot of calculating hardly, therefore can not increase extra burden to system.
Though describe and illustrated the system and method that is used for real-time Transmission computing machine thread information (cyber thread information) according to of the present invention with respect to preferred implementation of the present invention at this, but those skilled in the art is to be understood that under the prerequisite that does not deviate from the spirit and scope of the invention defined by the claims, can carry out multiple variation and change to the present invention.
Claims (7)
- Transmitter terminal in the enciphered digital voice communication of using the uni-directional wireless environment insert be used for estimating tone again lock in time section the method for vector information of speech data, this method comprises:If with respect to the frame that will send, tone arrives lock in time again, then deletes the tone speech data in section lock in time again;Obtain the speech data and the difference between the speech data of preceding frame of present frame, and use voice change direction (+,-) information structuring vector information, wherein said voice change direction (+,-) information is the result of the difference that obtained; AndInsert described vector information and tone synchronizing information more again section lock in time at the tone from its deletion speech data.
- 2. method according to claim 1, wherein, constitute sinusoidal wave phonetic feature by using, construct in the following manner described voice change direction (+,-) information: (+) information is corresponding to the speech data that is in the increase direction, and (-) information is corresponding to being in the speech data that reduces direction.
- Transmitter terminal in the enciphered digital voice communication of using the uni-directional wireless environment send be used for estimating tone again lock in time section the method for vector information of speech data, this method comprises:Carry out sound by voice and synthesize to come coded voice data input;Judgement is with respect to the speech data of having encoded, and whether tone arrives lock in time again;According to the result who judges, produce tone synchronization frame again by in described speech data, inserting the vector information that constitutes by voice change direction information, and produce speech frame from described speech data; AndThe tone that transmission is produced is synchronization frame and described speech frame again,Wherein, if being tone, the result who judges arrives lock in time again, then by from tone again section lock in time the described speech data of deletion and described tone insert in section lock in time again the described vector information that constitutes by voice change direction information and described tone again synchronizing information produce tone synchronization frame againIf the result who judges is tone no show lock in time again, then produce the described speech frame that comprises described speech data.
- 4. method according to claim 3, wherein, described vector information be the voice change direction (+,-) information, this voice change direction (+,-) information be obtain by the speech data of present frame and the difference between the speech data of preceding frame and constitute sinusoidal wave phonetic feature by using, construct in the following manner described voice change direction (+,-) information: (+) information is corresponding to the speech data that is in the increase direction, and (-) information is corresponding to being in the speech data that reduces direction.
- 5. the receiver end in the enciphered digital voice communication of using the uni-directional wireless environment uses vector information to estimate the tone method of the speech data in section lock in time again, and this method comprises:Analyze the type of received frame by the head of analysis frame;If described received frame is a tone synchronization frame again, then extract tone synchronizing information and described vector information again the synchronization frame again from the tone that has sent;The tone that uses described extraction again synchronizing information to carry out tone synchronous again, obtain and the rate of change of the speech data of more described vector information and received frame;If the voice change direction information and the described rate of change that obtain from described vector information analysis are to be in same direction, then on oblique line, extract the speech data value, otherwise with the straight line of described oblique line symmetry on extract described speech data value; AndUse the speech data value extracted to estimate the described tone speech data in section lock in time again, and the described speech data of decoding is to export corresponding voice.
- 6. method according to claim 5, wherein, if the result who judges is that received frame is not a tone synchronization frame again, the described received speech data of then decoding, and use at preceding frame and present frame and calculate and store the rate of change of current speech data.
- 7. method according to claim 5, wherein, described vector information be the voice change direction (+,-) information, this voice change direction (+,-) information is to obtain by the speech data of present frame and the difference between the speech data of preceding frame, and constitute sinusoidal wave phonetic feature by using, construct in the following manner described voice change direction (+,-) information: (+) information is corresponding to the speech data that is in the increase direction, and (-) information is corresponding to being in the speech data that reduces direction.
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| Application Number | Priority Date | Filing Date | Title |
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| KR111860/06 | 2006-11-13 | ||
| KR20060111860 | 2006-11-13 | ||
| KR25571/07 | 2007-03-15 | ||
| KR1020070025571A KR100902112B1 (en) | 2006-11-13 | 2007-03-15 | Insertion method and transmission method of vector information for voice data estimating in key re-synchronization, and voice data estimating method in key re-synchronization using vector information |
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| CN101183528A CN101183528A (en) | 2008-05-21 |
| CN101183528B true CN101183528B (en) | 2011-04-20 |
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| CN109120371B (en) * | 2018-10-17 | 2019-11-15 | 广州卫富科技开发有限公司 | A kind of Jam-resistant Secure Communications method of simplex communication state Imitating vision signal |
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| Sang-Uk Ryu, et al..Encoder Assisted Frame Loss Concealment for MPEG-AAC Decoder.《Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on》.2006,第5卷 * |
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|---|---|
| KR100902112B1 (en) | 2009-06-09 |
| CN101183528A (en) | 2008-05-21 |
| KR20080043198A (en) | 2008-05-16 |
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